Headphone stand



FIG. 1 shows a front perspective view of a headphone stand showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is an inverted left side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is an inverted front view thereof. 

CLAIM The ornamental design for a headphone stand, as shown and described. 